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Palaeomagnetism of Eocene Talerua Member lavas on Hareoen, West Greenland

Schmidt, AG; Riisager, Peter LU ; Abrahamsen, N; Riisager, J; Pedersen, AK and Van der Voo, R (2005) In Bulletin of the Geological Society of Denmark 52(1). p.27-37
Abstract
The results of a paleomagnetic sampling carried out along two vertical profiles (altogether 19 lava flows, 126 samples) covering the entire stratigraphy of the Talerua Member lavas (similar to 39 Myr old) that outcrop on the island Hareoen are presented and represent some of the youngest volcanism in the West Greenland flood volcanic province. Rock magnetic experiments and microprobe analysis demonstrate that the dominant magnetic mineral in all Studied lavas is titanomagnetite that has experienced variable amounts of high temperature cleuteric oxidation as well as low temperature hydrothermal oxidation. Based on detailed demagnetization experiments, well-defined palaeomagnetic site-mean directions were isolated from all 19 lavas. The... (More)
The results of a paleomagnetic sampling carried out along two vertical profiles (altogether 19 lava flows, 126 samples) covering the entire stratigraphy of the Talerua Member lavas (similar to 39 Myr old) that outcrop on the island Hareoen are presented and represent some of the youngest volcanism in the West Greenland flood volcanic province. Rock magnetic experiments and microprobe analysis demonstrate that the dominant magnetic mineral in all Studied lavas is titanomagnetite that has experienced variable amounts of high temperature cleuteric oxidation as well as low temperature hydrothermal oxidation. Based on detailed demagnetization experiments, well-defined palaeomagnetic site-mean directions were isolated from all 19 lavas. The composite profile contains two magnetic polarity zones suggesting a maximum duration of Talerua Member volcanism of -1.4 Ma. After grouping flows having the same remanent magnetic field direction, 13 individual readings of the palaeomagnetic fields were obtained. The palaeomagnetic pole with coordinates 76.3 degrees N, 201.5 degrees E (A95=7.4 degrees, K=32.7, N=13) is in good accordance with paleomagnetic poles from other continents rotated back to Greenland using plate kinematic rotation poles. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
volcanics, Paleogene, West Greenland, palaeomagnetism, magnetic polarity, North Atlantic igneous province
in
Bulletin of the Geological Society of Denmark
volume
52
issue
1
pages
27 - 37
publisher
Geological Society of Denmark
external identifiers
  • wos:000233452500004
  • scopus:33645417781
ISSN
0011-6297
language
English
LU publication?
yes
id
26657e08-3660-4ae1-a1bd-fb2c7e5f811b (old id 212329)
alternative location
http://www.priisager.dk/pdfs/DGF%20Bulletin%2052-2.pdf
http://2dgf.dk/medlem_pdf/Bull52-1-27-38.pdf
date added to LUP
2007-08-22 16:12:19
date last changed
2017-08-13 04:29:24
@article{26657e08-3660-4ae1-a1bd-fb2c7e5f811b,
  abstract     = {The results of a paleomagnetic sampling carried out along two vertical profiles (altogether 19 lava flows, 126 samples) covering the entire stratigraphy of the Talerua Member lavas (similar to 39 Myr old) that outcrop on the island Hareoen are presented and represent some of the youngest volcanism in the West Greenland flood volcanic province. Rock magnetic experiments and microprobe analysis demonstrate that the dominant magnetic mineral in all Studied lavas is titanomagnetite that has experienced variable amounts of high temperature cleuteric oxidation as well as low temperature hydrothermal oxidation. Based on detailed demagnetization experiments, well-defined palaeomagnetic site-mean directions were isolated from all 19 lavas. The composite profile contains two magnetic polarity zones suggesting a maximum duration of Talerua Member volcanism of -1.4 Ma. After grouping flows having the same remanent magnetic field direction, 13 individual readings of the palaeomagnetic fields were obtained. The palaeomagnetic pole with coordinates 76.3 degrees N, 201.5 degrees E (A95=7.4 degrees, K=32.7, N=13) is in good accordance with paleomagnetic poles from other continents rotated back to Greenland using plate kinematic rotation poles.},
  author       = {Schmidt, AG and Riisager, Peter and Abrahamsen, N and Riisager, J and Pedersen, AK and Van der Voo, R},
  issn         = {0011-6297},
  keyword      = {volcanics,Paleogene,West Greenland,palaeomagnetism,magnetic polarity,North Atlantic igneous province},
  language     = {eng},
  number       = {1},
  pages        = {27--37},
  publisher    = {Geological Society of Denmark},
  series       = {Bulletin of the Geological Society of Denmark},
  title        = {Palaeomagnetism of Eocene Talerua Member lavas on Hareoen, West Greenland},
  volume       = {52},
  year         = {2005},
}